KR101295105B1 - Crankshaft milling machine - Google Patents

Abstract

Two workpiece rests, or workpiece rests and workpieces are brought into close proximity. This crankshaft mirror is provided with a pair of work heads 3a and 3b, a pair of swing heads 12a and 12b, and a pair of work rests 13a and 13b. Each work rest 13a, 13b has the main body frame 24 which moves with the corresponding swing head 12a, 12b, a pair of clampers 25, and a clamper movement mechanism 26. As shown in FIG. The pair of clampers 25 are provided on side surfaces of the main body frame 24 opposite to the swing heads 12a and 12b, one end of which is rotatably supported by the main body frame 24, and the other end thereof can be opened and closed. The clamper moving mechanism 26 is disposed on the swing heads 12a and 12b side than the pair of clampers 25 and moves the pair of clampers 25 along the main axis with respect to the main frame 24.

Description

Crankshaft Miller {CRANKSHAFT MILLING MACHINE}

The present invention relates to a crankshaft mirror, in particular a crankshaft miller having at least one workpiece rest for gripping a workpiece to be machined.

As an apparatus for cutting the main journal and pin journal of a crankshaft, a crankshaft mirror is provided (for example, patent document 1). The crankshaft mirror has a pair of work heads provided on the bed, a pair of cutters disposed between the two work heads, and a work rest that is provided corresponding to each cutter and grips the work piece during processing. In addition, these work heads, cutters, and work rests can be moved in the direction along the main axis (the longitudinal direction of the bed).

Here, a set of cutters and a work rest are fixed on one bird and the birds are movable on the base. In other words, the cutter and the work rest can move along the main axis on the base as the birds move.

In the crankshaft miller shown in Patent Document 1, the cutter and the work rest are supported together by the saddle, and the positional relationship of each other is fixed. Thus, when the relative position of a cutter and a work rest is fixed, there exists a restriction on a process.

Then, in order to remove such a processing restriction, the crankshaft mirror which made it possible to change the distance between a cutter and a work rest is shown by patent document 2. As shown in FIG. In the crankshaft miller shown in Patent Document 2, the cutter and the work rest are mounted on separate sliders, and the distance between the cutter and the work rest can be changed by moving the sliders by separate driving means.

In addition, Patent Document 3 shows a crankshaft miller in which only a pair of clampers are moved instead of the entire work rest. The workpiece rest of this crankshaft miller is comprised by a main body frame, a pair of clampers, and a clamper moving mechanism. The pair of clampers is supported by the main body frame so as to be openable and close, and the clamper moving mechanism makes it possible to move the main frame along the main axis.

[Patent Document 1] Japanese Unexamined Patent Publication No. 1994-320319

[Patent Document 2] Japanese Unexamined Patent Publication No. 1998-71518

[Patent Document 3] Japanese Unexamined Patent Publication No. 2005-219131

In the crankshaft miller shown in Patent Document 3, the distance between the cutter and the work rest can be easily changed by moving only the clamper, not the whole work rest.

Here, in patent document 3, a clamper movement mechanism is arrange | positioned at the side which opposes the other workpiece rest as a main surface of a workpiece rest. And this mechanism is provided so that it may protrude from the main body frame to the other workpiece rest side.

Thus, in the crankshaft mirror of patent document 3, since the clamper movement mechanism of one workpiece | rest rest protrudes toward the other workpiece | rest rest side, in order to avoid the interference of the protrusion of a clamper movement mechanism and the workpiece | restrest, Workpiece rests cannot be close to each other. Therefore, depending on the machining site, the workpiece can be held only by one workpiece rest, and the posture of the workpiece may not be stabilized during processing.

In addition, when the structure of patent document 3 is applied to the crankshaft miller in which only the work rest is provided, the cutter of the other cannot be approached with respect to the work rest for the clamp moving mechanism which protrudes. Therefore, there is a problem such as an increase in the processing process.

An object of the present invention is to provide a crankshaft miller having a work rest that allows only a clamper to move, so that it is possible to approach a work part including the other work rest or the other cutter with respect to one work rest. Is in.

The crankshaft mirror which concerns on 1st invention is equipped with the 1st workpiece support part, the 2nd workpiece support part, the 1st process part, and the 1st workpiece rest. The first workpiece support and the second workpiece support support both end portions in the longitudinal direction of the workpiece along the main axis. The 1st processing part is arrange | positioned so that a movement is possible along a main axis between two workpiece support parts, and processes a workpiece | work. The first work rest is disposed on the side opposite to the first work support portion with the first processing portion interposed therebetween, to sandwich the work. The first work rest has a main body frame that moves together with the first machining portion, a pair of clampers, and a first clamper moving mechanism. A pair of clampers are respectively provided in the side surface on the opposite side to the 1st process part of a main body frame, one end is rotatably supported by a main body frame, and is movable so that it can move along a main shaft, and the other end can be opened and closed. The first clamper moving mechanism is disposed closer to the first machining portion than the pair of clampers, and moves the pair of clampers along the main axis with respect to the main frame.

In this apparatus, both ends of the workpiece are supported by the first workpiece support and the second workpiece support. The workpiece supported by the two workpiece support portions is sandwiched by a pair of clampers of the first workpiece rest and processed by the first machining portion. And when it is going to change the position which clamps a workpiece | work, a pair of clampers are moved along a main axis by a 1st clamper moving mechanism. At this time, a pair of clampers move with respect to the main frame of the first work rest. That is, only a pair of clampers moves.

Here, the 1st clamper moving mechanism is arrange | positioned rather than a pair of clampers on the 1st process part side. That is, the first clamper moving mechanism does not protrude to the other side than the clamper. Therefore, there is no possibility that the first clamper moving mechanism interferes with the other machined part or the work rest, and the first work rest can be approached by the other machined part or the work rest compared with the conventional one. Therefore, the workpiece can be held firmly and the processing constraints are reduced.

In the crankshaft mirror according to the second invention, in the crankshaft mirror according to the first invention, the first clamper moving mechanism has a protruding portion that protrudes from the main body frame to the first processing portion side, and the first processing portion has a workpiece inside. It has a cutter drum which penetrates through, and can rock about the rocking shaft parallel to a main shaft, and can move to the direction orthogonal to a rocking shaft. And the protrusion part of a 1st clamper moving mechanism is arrange | positioned outside the moving area of a 1st process part.

Here, in the crankshaft miller, the first processing part moves while swinging. That is, the 1st processing part has the movement area of a predetermined range. Therefore, when the 1st clamper moving mechanism protrudes to the 1st process part side, there exists a possibility that this protrusion may interfere with the 1st process part to which it moves.

In the second invention, the protrusion of the first clamper moving mechanism is disposed outside the moving region of the first machining portion. Therefore, interference between the first clamper moving mechanism and the first machining portion can be avoided.

The crankshaft miller according to the third invention is the crankshaft miller according to the second invention, wherein the first clamper movement mechanism guides the movement of the movable block and the movable block supported by the main frame so as to be movable along the main axis. It has a guide part and the drive part which moves a movable block. Moreover, a pair of clampers are supported by the movable block.

Here, a pair of clampers are supported by the movable block, and the movable block is guided and moved in a guide part. Therefore, the pair of clampers move along the main axis stably and smoothly.

The crankshaft miller according to the fourth invention is the crankshaft miller according to the third invention, wherein the guide portion includes: a first guide unit and a second guide unit disposed up and down with the rotational support portions of the pair of clampers interposed therebetween; It has the 3rd guide unit arrange | positioned at the side of the rotation support part between 1st guide unit and a 2nd guide unit.

Here, a movable block is guided by the guide unit provided in three places of the upper and lower sides and between them. Therefore, the movement becomes smoother.

The crankshaft miller according to the fifth invention is the crankshaft miller according to the fourth invention, wherein the driving portion of the first clamper moving mechanism is configured to drive one piston and one piston whose front end is fixed to a part of the movable block. Have a cylinder

As described above, the movable block is guided and moved to three guide units. It is also conceivable to provide a driving unit in each guide unit. However, in the case where a plurality of driving units are provided, it is necessary to make them work in synchronization. And if motivation cannot be obtained, smooth movement cannot be performed.

However, in the present invention, since the movable block is driven by one piston, synchronous control is unnecessary, and the clamper can be moved simply and smoothly.

The crankshaft mirror according to the sixth invention further includes a second machining portion and a second work rest in the crankshaft mirror of the first invention. The second processing part is disposed to face the first processing part between the two work support parts, and is movable along the main axis to process the work. The second workpiece rest is disposed on the side opposite to the second workpiece support portion with the second machining portion interposed therebetween, to sandwich the workpiece. In addition, the second work rest has a main body frame which moves together with the second machining portion, a pair of clampers, and a second clamper moving mechanism. A pair of clampers are respectively provided in the side surface on the opposite side to the 2nd process part of a main body frame, one end is rotatably supported by a main body frame, and is movable so that it can move along a main shaft, and the other end can be opened and closed. The second clamper moving mechanism is disposed closer to the second processing portion than the pair of clampers, and moves the pair of clampers along the main axis with respect to the main frame.

Here, in addition to the 1st processing part and the 1st work rest, the 2nd processing part and the 2nd work rest are provided. And also about the 2nd process part and the 2nd workpiece rest, it has the structure similar to 1st invention. Therefore, as described above, there is no fear that the first clamper moving mechanism and the second clamper moving mechanism interfere with the other work rest, and the first work rest and the second work rest are compared with the other work pieces. By rest. Therefore, the workpiece can be held firmly.

The crankshaft miller according to the seventh invention is the crankshaft miller according to the sixth invention, wherein the second clamper moving mechanism has a protruding portion that protrudes from the main body frame to the first processing portion side, and the second processing portion has a workpiece inside. It has a cutter drum which penetrates through, and can rock about the rocking shaft parallel to a main shaft, and can move to the direction orthogonal to a rocking shaft. And the protrusion part of a 2nd clamper moving mechanism is arrange | positioned outside the moving area of a 2nd process part.

In this seventh invention, since the projections of the first clamper moving mechanism and the second clamper moving mechanism are arranged outside the moving region of the processing portion, similarly to the second invention, the interference of both can be avoided.

As described above, in the present invention, a processing part including the other work rest or the other cutter can be proximate to one work rest. Therefore, processing restrictions are reduced and the workpiece can be processed efficiently.

1 is an external perspective view of a crankshaft mirror according to an embodiment of the present invention.
It is an external view which looked at one workpiece rest from the other workpiece rest side.
3 is a cross-sectional view taken along the line III-III of FIG. 2.
4 is an enlarged partial view of FIG. 2.
5 is a perspective partial view of the workpiece rest.
6 is a cross-sectional view taken along the line VI-VI of FIG. 2.
7 is a view showing the positional relationship between the moving range of the swing head and the protrusion of the clamper moving mechanism.

[Overall configuration]

1 is an external perspective view of a crankshaft mirror according to an embodiment of the present invention. The crankshaft miller 1 includes a bed 2, a first work head 3a and a second work head 3b (workpiece support part) arranged to face each other on the bed 2, and a work piece thereof. The 1st processing unit 4a and the 2nd processing unit 4b arrange | positioned between the heads 3a and 3b are provided.

[Workpiece head]

The first work head 3a and the second work head 3b support both ends of the crankshaft as a work. Chuck (not shown) which clamps a crankshaft is provided in each end surface (opposing surface) of each work head 3a, 3b.

The chuck may be provided on one work head 3a and a tail stock supporting the center hole of the crankshaft end face may be provided on the other work head 3b.

[Processing Unit]

Each of the first processing unit 4a and the second processing unit 4b includes saddles 10a and 10b and slides 11a and 11b provided on the saddles 10a and 10b. In addition, each of the 1st processing unit 4a and the 2nd processing unit 4b is the 1st swing head and the 2nd swing head (processing part) 12a, 12b which were provided in the slide 11a, 11b, It has the 1st workpiece rest 13a and the 2nd workpiece rest 13b.

<Saddle>

The two saddles 10a and 10b have the same configuration, and the respective saddles 10a and 10b are movable in the longitudinal direction (direction along the main axis = Z-axis direction) of the bed 2 by the Z-axis feed mechanism. . The Z-axis feed mechanism is a well-known mechanism, comprising a nut member fixed to the saddles 10a and 10b, a ball screw shaft extending along the Z axis and screwed by the nut member, and a Z axis feed motor connected to the ball screw shaft. Have The saddles 10a and 10b can be moved in the Z-axis direction by forward and reverse rotation of the ball screw shaft by the Z-axis feed motor.

<Slide>

The two slides 11a and 11b have the same structure, and each slide 11a and 11b is movable by the Y-axis feed mechanism in the Y-axis direction orthogonal to the Z-axis (the depth direction of the bed 2). Do. These slides 11a and 11b have a vertical support wall 111 extending along the Y axis. A swing shaft 15 is provided at one end of the support wall 111, and a case 112 of an angular cylinder shape extending in the vertical direction is provided at the other end of the support wall 111. The Y-axis feed mechanism is a well-known mechanism, which includes a nut member fixed to the slides 11a and 11b, a ball screw shaft extending along the Y axis and screwed with the nut member, and a Y-axis feed motor to which the ball screw shaft is connected. Have Then, by rotating the ball screw shaft by the Y-axis feed motor, the slides 11a and 11b can be moved in the Y-axis direction.

<Swing head (processing department)>

The 1st swing head 12a and the 2nd swing head 12b are the same structure, and are attached to the corresponding slide 11a, 11b, respectively. One end of each swing head 12a, 12b is supported by the oscillation shaft 15, and the other end of the swing head 12a, 12b is slidably supported with respect to the guide member 16 in the case 112 in the Y-axis direction.

The guide member 16 is movable up and down in the case 112. Specifically, the nut member 17 is fixed to the guide member 16. And the nut member 17 is screwed to the ball screw shaft 18 extended along the X-axis provided in the case 112 in the up-down direction. The ball screw shaft 18 is connected to the X-axis swing motor (AC servo motor) 19 attached to the side surface of the case 112 in the Z-axis direction.

With the above configuration, the ball screw shaft 18 is rotated forward and backward by the X-axis swing motor 19, whereby each swing head 12a, 12b is moved up and down about the swing shaft 15. It is made to swing in the (X-axis direction).

The cutter drum 20 is rotatably supported inside each swing head 12a, 12b. An opening is formed in the machining stage side of the cutter drum 20, and a cutter (not shown) is attached to this opening. The cutter drum 20 is rotated by the cutter drum motor 21.

<Work rest>

The first work rest 13a and the second work rest 13b clamp the main journal adjacent to the work part when, for example, the pin journal of the crankshaft is machined ( clamping) to support the crankshaft from shaking during machining. These work rests 13a and 13b are, as shown in FIG. 1, in the saddles 10a and 10b of the first processing unit 4a and the second processing unit 4b, the corresponding first swing heads ( It is arrange | positioned in the state which kept the relative position of 12a) and the 2nd swing head 12b constant. Therefore, as each saddle 10a, 10b moves, one swing head 12a and the work rest 13a move together or the other swing head 12b and the work rest 13b move together. have.

Since the 1st work rest 13a and the 2nd work rest 13b are the same structure, the 1st work rest 13a is demonstrated with reference to FIGS. 2 is the figure which looked at the 1st work rest 13a from the 2nd work rest 13b side, FIG. 3 is sectional drawing of the III-III line of FIG. 2, FIG. 4 is an enlarged partial view of FIG. FIG. 5 is a perspective partial view of the first work rest 13a as seen from the side opposite to FIG. 2.

As shown in FIG. 2, the first work rest 13a includes a main frame 24, a pair of clampers 25, a clamper moving mechanism 26, and a clamper lock mechanism 27.

Body Frame

The main body frame 24 is formed in a substantially rectangular shape as viewed from the direction along the main axis. The main body frame 24 is fixed to the saddle 10a and is movable in the Z-axis direction along the main axis together with the saddle 10a by the Z-axis feed mechanism.

The circular opening part 24a is provided in the center part of the main body frame 24, and a crankshaft can pass through this opening part 24a. Moreover, the notch part 24b which opens toward an outer side is formed in the side part of the main body frame 24. As shown in FIG.

-Clamper-

The pair of clampers 25 are arranged on the side opposite to the first swing head 12a with the main frame 24 interposed therebetween, and provided to the movable block 30 provided at the cutout 24b of the main frame 24. It is supported to open and close. The movable block 30 is provided with a pair of support shafts 31, one end side of the pair of clampers 25 is rotatably supported by these support shafts 31, and the other end side is openable. have. In FIG. 2, the clamper 25 in the closed state is shown by the solid line, and the clamper 25 in the open state is shown by the dashed-dotted line. A semi-circular notch 25a is formed at the center of the surface of the respective clampers 25 that faces the other clamper. The rest pad 25b which supports a workpiece | work is provided in this notch 25a.

As shown in FIG. 3, the gear 32 which rotates about the support shaft 31 is being fixed to each rotation part of each clamper 25. As shown in FIG. The gears 32 fixed to each clamper 25 are meshed with each other. 4, the extension part 25b extended to the outer side of the rotating part is formed in the clamper 25 of one side (upper). The piston rod of the opening-closing hydraulic cylinder 33 is connected to this extension part 25b through the connecting member 33a. And a bushing (not shown) is provided between the extension part 25b and the connection member 33a. The hydraulic cylinder 33 for opening and closing is attached to the main body frame 24 at the upper end.

When the piston rod of the opening-closing hydraulic cylinder 33 expands and contracts as described above, the upper clamper 25 opens and closes, and the lower clamper 25 is also the upper clamper by the pair of gears 32. It is opened and closed in synchronization with (25). The opening and closing hydraulic cylinder 33 is fixed to the main frame 24, and the clamper 25 to which the piston rod of the opening and closing hydraulic cylinder 33 is mounted is about 20 mm in the Z axis direction, as described later. Move about. Thus, as described above, a bushing is formed between the connecting member 33a to which the piston rod is connected and the extension portion 25b of the clamper 25, so as to absorb the movement of the clamper 25 by elastic deformation of the bushing. Doing.

-Clamper moving mechanism-

The clamper moving mechanism 26 is a mechanism for moving the pair of clampers 25 in the Z-axis direction with respect to the main frame 24, and the movable block 30, the guide part 35, and the hydraulic pressure for movement are described above. It has a cylinder 36. 6 is a sectional view taken along the line VI-VI of FIG. 2.

As shown in FIG. 4, FIG. 5, etc., the movable block 30 is formed in rectangular shape, and is arrange | positioned so that the space | interval can be moved up and down and it can move to Z-axis direction in the notch 24b.

The guide part 35 guides the movement of the movable block 30, and the three linear movement guides 38 provided to the upper and lower sides of the movable block 30, and to the side outside of the support shaft 31 of the clamper 25 are provided. Consists of Each linear movement guide 38 consists of a block 38a and a rail 38b, the block 38a is provided in the main body frame 24, and the rail 38b is fixed to the movable block 30. As shown in FIG. . And the block 38b of the side linear movement guide 38 is being fixed to the mounting block 39 fixed to the main body frame 24. As shown in FIG.

The moving hydraulic cylinder 36 is arrange | positioned in the vicinity of the linear movement guide 38 provided below, and is attached to the mounting block 39. As shown in FIG. And as shown in FIG. 6 which is sectional drawing of the VI-VI line of FIG. 2, the member 38c in which the front-end | tip of the piston rod 36a of the hydraulic cylinder 36 for movement was fixed to the rail 38b of the linear movement guide 38 is fixed. )

By such a configuration, when the piston rod 36a of the moving hydraulic cylinder 36 expands and contracts, the movable block 30 and the pair of clampers 25 attached thereto are guided to the three linear movement guides 38. Move in the Z-axis direction.

-Clamper Lock Mechanism-

The clamper lock mechanism 27 is a mechanism for holding the clamper 25 in the closed state, and is provided on the open end side of the pair of clampers 25. This clamper lock mechanism 27 has a pair of guide rails 43, a clamp jaw 44, and a clamp cylinder 45, as shown in FIG.

The pair of guide rails 43 are provided in parallel with each other in the vertical direction, extending in the horizontal direction. The clamp jaw 44 is guided by a pair of guide rails 43, and an approach and a displacement can move freely toward a workpiece | work center. The clamp cylinder 45 is provided in the angle hole formed in the center part of the clamp jaw 44, and is fixed to the main body frame 24. As shown in FIG. The tip of the piston rod of the clamp cylinder 45 is attached to the clamp jaw 44. In addition, a pair of upper and lower legs 44a are formed at an end portion of the clamp jaw 44 on the clamper 25 side, and a pressing pad 46 is mounted inside each leg 44a. Further, clamp pads 47 are attached to the outside of the open end side of the clamper 25, respectively.

In such a clamper lock mechanism 27, the clamp jaw 44 moves back and forth toward the workpiece center by the expansion and contraction operation of the clamp cylinder 45. Then, the clamp pad 47 of the clamper 25 in the closed state is pressed by the pressing pad 46 of the clamp jaw 44, so that the clamper 25 is maintained in the closed state.

[Relationship between Clamper Moving Mechanism and Swing Head]

As is apparent from FIGS. 3 and 6, the clamper movement mechanism 26 of the first work rest 13a does not protrude from the body frame 24 to the second work rest 13b side. It has the part P (henceforth "protrusion part") which protruded from the 24 to the 1st swing head 12a side. Specifically, the movable block 30, the linear movement guide 38 of the guide mechanism 35, the moving hydraulic cylinder 36 including the piston rod 36a, and the mounting block 39 are the clampers 25. It is arrange | positioned protruding toward the 1st swing head 12a side rather than the surface S of the 2nd work rest 13b side of the. In addition, each member does not protrude from the surface S on the side of the second work rest 13b of the clamper 25 to the second work rest 13b side.

On the other hand, the protrusion part P of the clamper movement mechanism 26 is arrange | positioned so that it may be located outside the movement area M of the 1st swing head 12a. More specifically, the region M shown by the dashed-dotted line in FIG. 7 is a region in which the first swing head 12a moves during processing. And the protrusion part of the linear movement guide 38, the hydraulic cylinder 36 for movement, and the mounting block 39 is arrange | positioned outside this movement area | region M. As shown in FIG. 7 is the figure which looked at the movable range of the 1st swing head 12a from the 1st work head 3a side (the opposite side to the 1st work rest 13a).

As mentioned above, although the relationship between the clamper movement mechanism 26 of the 1st workpiece | rest rest 13a, and the 1st swing head 12a was demonstrated, the clamper movement mechanism 26 and 2nd swing head of the 2nd workpiece | rest rest 13b were demonstrated. The same applies to the relationship of (12b).

[action]

The machining operation of the crankshaft is the same as that of the conventional crankshaft mirror. That is, the clamp and unclamp of the crankshaft by the first work rest 13a and the second work rest 13b are controlled, and the machining positions of the first swing head 12a and the second swing head 12b are controlled. Controlled, the plurality of main journals and pin journals are cut. And the outer peripheral surface of a counterweight may be processed. The machining positions of the first swing head 12a and the second swing head 12b are controlled by moving the saddles 10a and 10b by the Z-axis feed mechanism. Then, each journal swings the first swing head 12a and the second swing head 12b by the X-axis feed mechanism while moving the slides 11a and 11b in the Y-axis direction by the Y-axis feed mechanism. Processed.

In the above processing, it is possible to process the crankshafts of various specifications by moving the pair of clampers 25 independently of the swing heads 12a and 12b by the respective clamper moving mechanisms 26. It becomes possible.

[Characteristic]

(1) Since the respective clamper moving mechanisms 26 do not protrude toward the other swing heads 12a and 12b, the two work rests 13a and 13b can be closer to each other than in the prior art. Therefore, for example, when machining a pin journal, the two main journals adjacent to the pin journal to be machined can be sandwiched by two workpiece rests 13a and 13b, and the crankshaft is firmly held to perform the machining. Can be.

(2) Although the clamper moving mechanism 26 of each work rest 13a, 13b has the protrusion P which protrudes to the corresponding swing head 12a, 12b side, this protrusion P is each swing head 12a, 12b. It is arrange | positioned so that it may be out of the range of the moving area M of. Therefore, the swing heads 12a and 12b can be similarly brought close to each other with the corresponding work rests 13a and 13b, and they are not restricted in the processing.

(3) The pair of clampers 25 are supported by the movable block 30, and the movable block 30 is guided and moved by the three linear movement guides 38. As shown in FIG. Therefore, the pair of clampers 25 can be smoothly moved in the Z-axis direction.

(4) The movable block 30 is guided by the linear movement guide 38 provided in three places of upper and lower sides and between them. Therefore, the movement of the clamp 25 supported by this movable block 30 becomes smoother.

(5) The movable block 30 is driven by one moving hydraulic cylinder 36. Therefore, the synchronous control of the hydraulic cylinder as in the case of driving with a plurality of hydraulic cylinders becomes unnecessary, so that the clamper 25 can be moved simply and smoothly.

[Other Embodiments]

The present invention is not limited to the above embodiments, and various variations or modifications can be made without departing from the scope of the present invention.

(a) In the above embodiment, the present invention is applied to a crankshaft mirror provided with a first swing head and a second swing head, and a first work rest and a second work rest, but only one swing head and a work rest, respectively. The present invention can also be applied to the crankshaft mirror provided.

(b) The specific structure of a clamper moving mechanism is not limited to the said embodiment, Any structure may be sufficient as it is a mechanism which moves a clamper to a Z-axis direction.

[Industry availability]

This crankshaft miller can adjoin the processing part including the other work rest or the other cutter with respect to one work rest. Therefore, processing restrictions are reduced and the workpiece can be processed efficiently.

1: crankshaft miller
3a, 3b: first work head, second work head (workpiece support)
4a, 4b: 1st processing unit, 2nd processing unit
12a, 12b: 1st swing head, 2nd swing head (processing part)
13a, 13b: first workpiece rest, second workpiece rest
20: cutter drum
24: body frame
25: clamper
26: clamper moving mechanism
30: movable block
35: guide
36: hydraulic cylinder for movement
38: linear movement guide

Claims (7)

A first workpiece support and a second workpiece support for supporting both end portions in the longitudinal direction of the workpiece along the main axis;
A first machining portion disposed between the two workpiece supporting portions so as to be movable along the main axis, for processing the workpiece;
A first work rest disposed on the side opposite to the first workpiece support with the first workpiece therebetween for clamping the workpiece;
Lt; / RTI &gt;
The first workpiece rest,
A main body frame moving together with the first processing part;
It is provided in the side surface on the opposite side to the said 1st process part of the said main body frame, respectively, and one end is rotatably supported by the said main body frame, and is movable so that it can move along a main axis, and the other end端) A pair of clampers that can open and close
A first clamper moving mechanism disposed on the side of the first processing portion rather than the pair of clampers and moving the pair of clampers along the main axis with respect to the main frame.
And a crankshaft mirror. The method of claim 1,
The said 1st clamper moving mechanism has the protrusion part which protrudes from the said main body frame to the said 1st process part side,
The first processing portion has a cutter drum through which the workpiece penetrates the inside, and can swing around a pivot shaft parallel to the main shaft, and can move in a direction orthogonal to the swing shaft,
A crankshaft mirror, wherein the protrusion of the first clamper movement mechanism is disposed outside the movement region of the first machining portion. The method of claim 2,
The first clamper moving mechanism,
A movable block movably supported along the main axis with respect to the main frame;
A guide part for guiding the movement of the movable block;
Drive unit for moving the movable block
And,
The crankshaft mirror, wherein the pair of clampers are supported by the movable block. The method of claim 3,
The guide portion may be disposed on the side of the pivot support portion between the first guide unit and the second guide unit and the first guide unit and the second guide unit disposed up and down with the pivot support portions of the pair of clampers interposed therebetween. A crankshaft mirror having a third guide unit disposed. 5. The method of claim 4,
The drive part of a said 1st clamper movement mechanism is a crankshaft mirror which has one piston whose tip was fixed to a part of the said movable block, and the cylinder for driving the said one piston. The method of claim 1,
A second machining portion disposed between the two workpiece supporting portions so as to face the first machining portion and movable along the main axis, and for processing the workpiece;
A second workpiece rest disposed on the side opposite to the second workpiece support with the second machining portion interposed therebetween for holding the workpiece;
Further comprising:
The second workpiece rest,
A main body frame moving together with the second processing unit,
A pair of clampers, each of which is provided on a side opposite to the second processing portion of the main body frame, one end of which is rotatably supported on the main body frame and movable along the main shaft, and the other end of which is open and close;
A second clamper moving mechanism, which is disposed on the second processing unit side rather than the pair of clampers, and moves the pair of clampers along the main axis with respect to the main frame.
And a crankshaft mirror. The method according to claim 6,
The second clamper moving mechanism has a protrusion that protrudes from the main body frame to the first processing part side,
The second processing portion has a cutter drum through which the workpiece penetrates the inside, and can swing around a pivot shaft parallel to the main shaft, and move in a direction orthogonal to the swing shaft,
A crankshaft mirror, wherein the protrusion of the second clamper moving mechanism is disposed outside the moving region of the second machining portion.

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